Superheater.



tinirnn stares Parent ora ion.

\VIL-HELM .PL ATZ, OF \VEINHEIM, GERMANY.

SUPERHEATER.

Specification of Letters Iat ent.

Patented Feb. 13, 1906.

Application filed September 29,1904. Serial No. 226,560.

have invented new and useful Improvements in and Relating to Superheaters, of which the following is a specification.

My invention relates to superheaters which are arranged in the smoke-box of' fire tube boilers or generators.

The invention consists, substantially, in conducting the steam to be superheated through superheater-tubes of such a small diameter that when these tubes are placed behind the fire-tubes the section of the latter will. remain quite or almost free. By reason of their accessibility the fire-tubes may therefore be conveniently cleaned. For the same steam-pressure the small tubes may, more over, have thinner walls than the large tubes, which have heretofore been used exclusively. Thus the action of the heating-gases upon the steam is increased. The increased action is especially due to the fact that thevolumeof steam in the said tubes is very small and is therefore penetrated more rapidly by the heat conducted to the same.

In the accompanying drawings I have represented a preferred constructional 'form of this invention.

F lgure 11s a vertical transverse sectlon on the line C. D of Fig. 2, showing the superheater in the inoperative position, Fig.2 is a vertical longitudinal section on the line A B of Fig. -1. Fig.3 is' a vertical transverse 'section on the line E F of Fig. 2, showing the sup'erheate'r in the operative position wherein itstubes are-behind the orifices of the firetubes.

In this constructional form the superheater comprises a casing 7c, arranged horizontally in the smoke-box Z of the boiler or generator and above the fire-tubes b, the said casing be ing suspended, by means of slotted lugs r, from rods or brackets q, secured. to the end of the smoke-box Z. The casing 70 is divided by a longitudinal partition i into two compart ments h and i, Fig. 2, each of which is again divided by transverse partitions u into a pluralityof chambers, the last chamber of the first compartment h communicating with the adjacent chamber of the second compartment 11 through an orifice s in the partition 25,

Fig. 3. Several series of superheater-tubes a and. a, whichare shown of U-shaped form and are of a very small diameter, connect each two adjacent chambers of either compartments 7t and 1-, so that the steam to be superheatedtraverses each chamber of the two compartments as it passes through the series of tubeso and a from the inlet-pipe e to the outlet-pipef, Figs. 1 and 3.

When it is in operation, the superheater occupies the position indicated in Fig. 3, its tubes at and a being placed centrally benmd the orifices of the fire-tubes b. For cleaning the fire-tubes the superheater is displaced to the position indicated in Fig. 1, in which the orificesof the fire-tubes are quite clear of the superheater-tubes a and a. This is effected through the agency of a two-armed lever c 0, adapted to turn upon a fixed pivot 0 on the outside of the smoke-box and connected by a push-rod (Z, which passes through the wall of the said box, with a lug 0, attached to the superheater-casing 14:. In order to render the displacement of the superheater possible, the pipes e and f are movably connected with the pipes m and n. .This may be accomplished either by flexible metallic connections or by the pipes e and have horizontal branches extending into t e pipes m and n, furnished at their ends with stuffingboxes p 1).

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a superheater located in the smoke box of a fire-tube boiler behind the lire-tubes, superheater-tubes arranged at right angles to the fire-tubes at the rear of the same, the diameter of said superheater-tubes being much less than the diameter of the fire-tubes and the superheater-tubes being arranged at distances so as not entirely to cover the'openings in the ends of the fire-tubes and means for moving said superheater-tubes transversely of the boiler, substantially as described.

2. In a superheater of the class described, a casing, superheatentubes connected thereto, said tubes being arranged at right angles to the fire-tubes near the ends thereof, and

means for moving said superheater-tubes transversely of the boiler so as to'cover and uncover the openmgs of the fire-tubes.

3. In a superheater of the character described, the combination of a casing, divided by longitudinal partitions into compartments separated by transverse partitions into chambers, series of U-shaped superheater-tubes connecting each two adjacent chambers of either compartment, telesco ic steam inlet and outlet pipes, and means 'or displacing the superheater, substantially-as herein set forth.

4. In a superheater of the character described, the combination of a casing, divided by longitudinal partitions into compart-- ments separated by transverse partitions into chambers, series of U-sha'ped superheater-tubes connecting each two adjacent chambers of either compartment, telescopic steam inlet and outlet pipes, slotted'lugs provided on the said casing, brackets extending through these slotted lugs, and an operatinglever connected with the aforesaid casing for '1 H. W. HARRIS, JosrH. SEUTE;

presence of 

